Today's recipe is a reader request and it's a good one! I've been getting requests for whoopie pies for quite a while and now that I think about, I have no idea why I've been holding out on you. We've known each other far too long for me to be keeping this gem all to myself! To make it up to you I dolled up my original recipe adding a vanilla bean mascarpone filling creating a grown-up version of a childhood favorite. Think devil's food cake sandwiched with a cloud of sweet, fluffy vanilla bean frosting... I love the cake part of this ...